ReactNative工具类

判断输入内容是否为空

    /**
     * 是否为空
     * @param text
     * @returns {boolean}
     */
    static isTextEmpty(text) {
        if (text==undefined || text == null || text.trim() == '') {
            return true;
        }
        return false;
    }

判断对象是否为undefined 或者null

    /**
     * obj是否为空
     * @param object
     * @returns {boolean}
     */
    static isNull(object) {
        if (object == undefined || object == null) {
            return true;
        }
        return false;
    }

验证手机号

   /**
     * 验证是否为手机号
     * @param {*} str
     */
    static isPhoneAvailable(str) {
        let myreg = /^(13[0-9]|14[5-9]|15[012356789]|16[0-8]|17[0-8]|18[0-9]|19[0-9])[0-9]{8}$/;  ;
        if (this.isTextEmpty(str)) {
            return false;
        } else if (!myreg.test(str)) {
            return false;
        } else {
            return true;
        }
    }

获取当前时间的字符串

    /**
     * 获取当前时间的字符串
     * @param {时间戳}  
     */
    static getCurrentTimeStr() {
        var date = new Date();
        var y = date.getFullYear();
        var m = date.getMonth() + 1;
        m = m < 10 ? ('0' + m) : m;
        var d = date.getDate();
        d = d < 10 ? ('0' + d) : d;
        var h = date.getHours();
        h = h < 10 ? ('0' + h) : h;
        var minute = date.getMinutes();
        var second = date.getSeconds();
        minute = minute < 10 ? ('0' + minute) : minute;
        second = second < 10 ? ('0' + second) : second;
        return y + '' + m + '' +  d + '' + h + '' + minute + '' + second;
    };

判断是否是表情符号

   /**
     * 判断是否是表情符号
     * @param {value值}  
     */
    static isEmojiCharacterInString(substring) {
        for ( var i = 0; i < substring.length; i++) {
            var hs =substring.charCodeAt(i);
            if (0xd800 <=hs && hs <=0xdbff) {
                if (substring.length >1) {
                    var ls =substring.charCodeAt(i +1);
                    var uc = ((hs -0xd800) * 0x400) + (ls -0xdc00) + 0x10000;
                    if (0x1d000 <=uc && uc <=0x1f77f) {
                        return true;
                    }
                }
            } else if (substring.length >1) {
                var ls =substring.charCodeAt(i +1);
                if (ls ==0x20e3) {
                    return true;
                }
            } else {
                if (0x2100 <=hs && hs <=0x27ff) {
                    return true;
                } else if (0x2B05 <=hs && hs <=0x2b07) {
                    return true;
                } else if (0x2934 <=hs && hs <=0x2935) {
                    return true;
                } else if (0x3297 <=hs && hs <=0x3299) {
                    return true;
                } else if (hs ==0xa9 || hs ==0xae || hs ==0x303d || hs ==0x3030
                    || hs == 0x2b55 ||hs == 0x2b1c ||hs == 0x2b1b
                    || hs == 0x2b50) {
                    return true;
                }
            }
        }
      }